材料

Sand, stone, earth and similar materials: If sand, stone, earth, garden-use turf, moss and other similar material are needed, a layer of leak-proof protective matter must be laid on the floor. The exhibitor must take all preventive measures to keep the above-mentioned materials from sticking to and staining any part of the exhibition hall.

沙石，泥土及类似材料：如果需要使用沙石，泥土，花园用泥炭，苔及其他类似材料，必须在地板上铺贴一层防漏保护物，参展单位必须保证采取了所有的预防措施以免使上述材料粘污展馆的任何部位。

Heraeus Kulzer was on the forefront of the development of dental material being amongst the first to introduce commercially manufactured PMMA based denture materialspatented by Kulzer in the 1930 s, light cured composites, precious ceramics-bonding alloys, acrylic teeth, alginates and silicone impression materials and many more.

在齿科材料研发进程中，贺利氏古莎始终活跃在前沿阵地。例如：1930 年代，古莎首创商业化生产以 PMMA 为基质的牙托材料专利技术，以及光固化复合树脂、贵金属烤瓷合金、树脂牙、藻酸盐和硅橡胶印模材料等都在世界上处于领先地。

Heraeus Kulzer was on the forefront of the development of dental material being amongst the first to introduce commercially manufactured PMMA based denture materials-patented by Kulzer in the 1930', light cured composites, precious ceramics-bonding alloys, acrylic teeth, alginates and silicone impreion materials and many more.

在齿科材料研发进程中，贺利氏古莎始终活跃在前沿阵地。例如：1930 年代，古莎公司首创商业化生产以 PMMA 为基质的牙托材料专利技术，以及光固化复合树脂、贵金属烤瓷合金、树脂牙、藻酸盐和硅橡胶印模材料等都在世界上处于领先地位。

Heraeus Kulzer was on the forefront of the development of dental material being amongst the first to introduce commercially manufactured PMMA based denture materials-patented by Kulzer in the 1930's, light cured composites, precious ceramics-bonding alloys, acrylic teeth, alginates and silicone impression materials and many more.

在齿科材料研发进程中，贺利氏古莎始终活跃在前沿阵地。例如：1930 年代，古莎公司首创商业化生产以 PMMA 为基质的牙托材料专利技术，以及光固化复合树脂、贵金属烤瓷合金、树脂牙、藻酸盐和硅橡胶印模材料等都在世界上处于领先地位。

Heraeus Kulzer was on the forefront of the development of dental material being amongst the first to introduce commercially manufactured PMMA based denture materials-patented by Kulzer in the 1930's, light cured composites, precious ceramics-bonding alloys, acrylic teeth, alginates and silicone impression materials and many more.

在齿科材料研发进程中，贺利氏古莎始终活跃在前沿阵地。例如：1930 年代，古莎首创商业化生产以 PMMA 为基质的牙托材料专利技术，以及光固化复合树脂、贵金属烤瓷合金、树脂牙、藻酸盐和硅橡胶印模材料等都在世界上处于领先地。

Although it is known that small amounts of mercury are vaporizedwhen the fillings are used to chew food,and though Canada,France and Sweden have all placed restrictions on the use of mercury fillings,the FDA has always insisted that amalgams are safe.

所谓的银汞合金或者是填充材料，是用汞和其他材料混合制成的，这种方法从1800年就使用了尽管知道当填充材料用于咀嚼食物时少量的汞能被蒸发和吸入，尽管加拿大、法国和瑞典都将限制使用汞补牙，美国食品药品管理局还是坚持汞合金是安全的

Sorghum genome DNA had been transfered into rice variety via pollen tube pathway. In this paper, the molecular verification was performed by SSR technique. The result shown seventeen of sixty pairs of primers can reveal polymorphisms among donor, receptor and their stable offspring. Same bandings were amplified between donor and some offspring.

从60对SSR引物中筛选出17对，对供体高粱、受体水稻及其外源DNA导入后代稳定材料进行了分子验证，结果表明供体高粱与受体水稻间存在多态性、受体水稻与后代稳定材料间出现多态性，供体高粱与部分后代稳定材料间出现相同的扩增带，部分供体与受体共有的特征带在后代中消失、而有些后代出现了供体和受体均没有的扩增带。

The 25 acces-sions were classified into three major groups: A, B, and C by cluster analysis using UPGMA, which showed significant relationship with the origin regions of accessions. Thus, it was suggested that the Sichuan hulless barleys could be used as elite germplasms to enhance the genetic background for super-hulless barley breeding.

聚类分析结果表明， 25份材料可分成A、B、C 3大类，材料聚类与其来源地有明显的相关性。25份材料间的平均遗传距离较小(0.3240)，平均遗传多样性较低(0.5126)，遗传基础较为狭窄。

On the basis of their abundant structures, borates are widely used as laser materials,luminescence host materials and non-linear optical materials, and have therefore attractedconsiderable attention.

硼酸盐化合物以其丰富的结构类型和优异的性能被广泛用作激光材料、发光基质材料尤其是非线性光学晶体材料，因此一直是广大学者关注的热点。

Various grinding machine components are made of superhard materials, including certain machine grade ceramics, including such materials as carbides, nitrides, borides, oxides, oxynitrides, or any other ceramic component.

由超硬材料制造的各种磨床部件，超硬材料包括某些机械等级的陶瓷、诸如碳化物、氮化物、硼化物、氧化物、氧氮化物或任意其它陶瓷组分的材料。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！